------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.0.0-next-20221006 #1 Not tainted
------------------------------------------------------
syz-executor.3/4050 is trying to acquire lock:
ffffffff853fac98 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70
but task is already holding lock:
ffff88800f876820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ctx->lock){....}-{2:2}:
_raw_spin_lock+0x2a/0x40
__perf_event_task_sched_out+0x53b/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x30/0x40
raw_spin_rq_lock_nested+0x1e/0x30
task_fork_fair+0x63/0x4d0
sched_cgroup_fork+0x3d0/0x540
copy_process+0x4183/0x6e20
kernel_clone+0xe7/0x890
user_mode_thread+0xad/0xf0
rest_init+0x24/0x250
arch_call_rest_init+0xf/0x14
start_kernel+0x4c6/0x4eb
secondary_startup_64_no_verify+0xe0/0xeb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
_raw_spin_lock_irqsave+0x39/0x60
try_to_wake_up+0xab/0x1930
up+0x75/0xb0
__up_console_sem+0x6e/0x80
console_unlock+0x46a/0x590
vprintk_emit+0x1bd/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
kauditd_hold_skb.cold+0x3f/0x4e
kauditd_send_queue+0x233/0x290
kauditd_thread+0x5f9/0x9c0
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
-> #0 ((console_sem).lock){....}-{2:2}:
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
group_sched_out.part.0+0x2c7/0x460
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> &ctx->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ctx->lock);
lock(&rq->__lock);
lock(&ctx->lock);
lock((console_sem).lock);
*** DEADLOCK ***
2 locks held by syz-executor.3/4050:
#0: ffff88806ce37e98 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470
#1: ffff88800f876820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0
stack backtrace:
CPU: 0 PID: 4050 Comm: syz-executor.3 Not tainted 6.0.0-next-20221006 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
_raw_spin_lock_irqsave+0x39/0x60
down_trylock+0xe/0x70
__down_trylock_console_sem+0x3b/0xd0
vprintk_emit+0x16b/0x560
vprintk+0x84/0xa0
_printk+0xba/0xf1
report_bug.cold+0x72/0xab
handle_bug+0x3c/0x70
exc_invalid_op+0x14/0x50
asm_exc_invalid_op+0x16/0x20
RIP: 0010:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 5b a5 ef ff e8 56 a5 ef ff 65 8b 1d 1b fe ab 7e 31 ff 89 de e8 f6 a1 ef ff 85 db 0f 84 8a 00 00 00 e8 39 a5 ef ff <0f> 0b e9 a5 fe ff ff e8 2d a5 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88803e107c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803da99ac0 RSI: ffffffff815677b7 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b601b R12: ffff88800f876800
R13: ffff88806ce3d2c0 R14: ffffffff8547d200 R15: 0000000000000002
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdc9ca45b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdc99fbb218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fdc9cb58f68 RCX: 00007fdc9ca45b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdc9cb58f6c
RBP: 00007fdc9cb58f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007fdc9cb58f6c
R13: 00007ffe1ba8c9cf R14: 00007fdc99fbb300 R15: 0000000000022000
WARNING: CPU: 0 PID: 4050 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460
Modules linked in:
CPU: 0 PID: 4050 Comm: syz-executor.3 Not tainted 6.0.0-next-20221006 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:group_sched_out.part.0+0x2c7/0x460
Code: 5e 41 5f e9 5b a5 ef ff e8 56 a5 ef ff 65 8b 1d 1b fe ab 7e 31 ff 89 de e8 f6 a1 ef ff 85 db 0f 84 8a 00 00 00 e8 39 a5 ef ff <0f> 0b e9 a5 fe ff ff e8 2d a5 ef ff 48 8d 7d 10 48 b8 00 00 00 00
RSP: 0018:ffff88803e107c48 EFLAGS: 00010006
RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803da99ac0 RSI: ffffffff815677b7 RDI: 0000000000000005
RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff865b601b R12: ffff88800f876800
R13: ffff88806ce3d2c0 R14: ffffffff8547d200 R15: 0000000000000002
FS: 00007fdc99fbb700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc9cb59018 CR3: 0000000018378000 CR4: 0000000000350ef0
Call Trace:
ctx_sched_out+0x8f1/0xc10
__perf_event_task_sched_out+0x6d0/0x18d0
__schedule+0xedd/0x2470
schedule+0xda/0x1b0
exit_to_user_mode_prepare+0x114/0x1a0
syscall_exit_to_user_mode+0x19/0x40
do_syscall_64+0x48/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdc9ca45b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdc99fbb218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fdc9cb58f68 RCX: 00007fdc9ca45b19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fdc9cb58f6c
RBP: 00007fdc9cb58f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007fdc9cb58f6c
R13: 00007ffe1ba8c9cf R14: 00007fdc99fbb300 R15: 0000000000022000
irq event stamp: 204
hardirqs last enabled at (203): [] exit_to_user_mode_prepare+0x109/0x1a0
hardirqs last disabled at (204): [] __schedule+0x1225/0x2470
softirqs last enabled at (0): [] copy_process+0x1e15/0x6e20
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
Bluetooth: hci0: command 0x041c tx timeout
ISOFS: Unable to identify CD-ROM format.
ISOFS: Unable to identify CD-ROM format.
loop4: detected capacity change from 0 to 8
loop4: detected capacity change from 0 to 8
ISOFS: Unable to identify CD-ROM format.
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.5 not setting count and/or reply_len properly
loop4: detected capacity change from 0 to 264192
FAT-fs (loop4): Unrecognized mount option "nnonumtail=1" or missing value
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.5 not setting count and/or reply_len properly
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
ISOFS: Unable to identify CD-ROM format.
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.5 not setting count and/or reply_len properly
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.5 not setting count and/or reply_len properly
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pid=4257 comm=syz-executor.1
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pid=4258 comm=syz-executor.1
loop4: detected capacity change from 0 to 264192
FAT-fs (loop4): Unrecognized mount option "nnonumtail=1" or missing value
sg_write: data in/out 837/246 bytes for SCSI command 0x0-- guessing data in;
program syz-executor.0 not setting count and/or reply_len properly
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pid=4278 comm=syz-executor.1
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "nnonumtail=1" or missing value
loop3: detected capacity change from 0 to 264192
FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pid=4297 comm=syz-executor.1
loop4: detected capacity change from 0 to 264192
FAT-fs (loop4): Unrecognized mount option "nnonumtail=1" or missing value
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "nnonumtail=1" or missing value
loop3: detected capacity change from 0 to 264192
FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pid=4321 comm=syz-executor.1
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): Unrecognized mount option "nnonumtail=1" or missing value
loop3: detected capacity change from 0 to 264192
FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value
loop4: detected capacity change from 0 to 264192
FAT-fs (loop4): Unrecognized mount option "nnonumtail=1" or missing value
Bluetooth: hci0: command 0x041c tx timeout
audit: type=1400 audit(1665054324.906:11): avc: denied { read } for pid=4492 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4513 comm=syz-executor.2
Bluetooth: hci1: ACL packet for unknown connection handle 0
Bluetooth: hci1: ACL packet for unknown connection handle 0
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4528 comm=syz-executor.2
Bluetooth: hci7: ACL packet for unknown connection handle 0
Bluetooth: hci1: ACL packet for unknown connection handle 0
audit: type=1400 audit(1665054325.194:12): avc: denied { write } for pid=4514 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4542 comm=syz-executor.2
Bluetooth: hci7: ACL packet for unknown connection handle 0
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4553 comm=syz-executor.2
Bluetooth: hci7: ACL packet for unknown connection handle 0
Bluetooth: hci1: ACL packet for unknown connection handle 0
Bluetooth: hci1: ACL packet for unknown connection handle 0
hrtimer: interrupt took 18424 ns
Bluetooth: hci0: command 0x041c tx timeout
loop6: detected capacity change from 0 to 264192
loop6: detected capacity change from 0 to 264192
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
loop6: detected capacity change from 0 to 264192
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
loop6: detected capacity change from 0 to 264192
Bluetooth: hci0: command 0x041c tx timeout
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.1'.
loop6: detected capacity change from 0 to 264192
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
Bluetooth: hci0: command 0x041c tx timeout
loop0: detected capacity change from 0 to 736
ISO 9660 Extensions: RRIP_1991A
loop7: detected capacity change from 0 to 132
loop0: detected capacity change from 0 to 736
loop4: detected capacity change from 0 to 512
ISO 9660 Extensions: RRIP_1991A
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir379318124/syzkaller.FxrgN3/67/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop4): unmounting filesystem.
loop7: detected capacity change from 0 to 132
loop0: detected capacity change from 0 to 736
ISO 9660 Extensions: RRIP_1991A
loop4: detected capacity change from 0 to 512
loop7: detected capacity change from 0 to 132
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /syzkaller-testdir379318124/syzkaller.FxrgN3/68/file0 supports timestamps until 2038 (0x7fffffff)
EXT4-fs (loop4): unmounting filesystem.
loop6: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 132
loop4: detected capacity change from 0 to 512
loop0: detected capacity change from 0 to 736
ISO 9660 Extensions: RRIP_1991A
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.
sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current]
ext4 filesystem being mounted at /syzkaller-testdir379318124/syzkaller.FxrgN3/69/file0 supports timestamps until 2038 (0x7fffffff)
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present
sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 40 00 00 02 00
I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
EXT4-fs (loop4): unmounting filesystem.
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 256, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
loop1: detected capacity change from 0 to 3504
I/O error, dev sr0, sector 257 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 257, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 258 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 258, async page read
ISO 9660 Extensions: Microsoft Joliet Level 3
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 259 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 259, async page read
ISOFS: changing to secondary root
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 260 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 260, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 261 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 261, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 262 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 262, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 263 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 263, async page read
loop6: detected capacity change from 0 to 40